/*
 * Copyright (c) 2012 The Chromium Authors. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *    * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *    * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @fileoverview Functions related to WebGL-relevant capability detection.
 * @author wiltzius@google.com (Tom Wiltzius)
 */

self.onMessage = function(event) {
  // ignore the message
  return;
}

/**
 * Tries to send a small ArrayBuffer to a worker to test if the browser
 * supports transferable typed arrays. The worker is this file, so the
 * name of this file matters (capabilities.js).
 */
function supportsTransferables() {
  console.log('Testing browser transferable typed array capability');
  var worker = new Worker('capabilities.js');
  worker.postMessage = worker.webkitPostMessage || worker.postMessage;
  var ab = new ArrayBuffer(1);
  var supported = false;
  try {
    worker.postMessage(ab, [ab]);
    if (ab.byteLength) {
      console.log("Transferables aren't supported in this browser " +
                  "(postMessage signature with transferables exists, " +
                  "but not working)");
    } else {
      console.log('Transferables are supported!')
      supported = true;
    }
  }
  catch(err) {
    console.log("Transferables aren't supported in this browser");
  }
  finally {
    worker.terminate();
    if(supported) {
      return true;
    }
    else {
      return false;
    }
  }
}

